<%= section_panel 'Diagram',
                  :width    => 'double',
                  :position => 'left',
                  :menu     => @diagram && [link_to(icon('expand'),
                                                    diagram_assembly_design_platform_path(@assembly, @platform, :size => '14,9'),
                                                    :target => '_blank',
                                                    :class  => 'btn btn-mini')] do %>
  <%= render 'base/platforms/diagram' %>
<% end %>
